Node.js 16.6 shared flag on WebAssembly Memory() constructor

The flag was enabled in V8 9.2.45, see: v8/v8@be9ff65
Node.js 16.5 used V8 9.1, and Node.js used V8 9.2.230, see: https://nodejs.org/dist/index.json

See also: nodejs/node#45074

Author: caugner

webassembly/api/Memory.json

@@ -118,13 +118,7 @@
                   "version_added": false
                 },
                 "nodejs": {
-                  "version_added": "12.0.0",
-                  "flags": [
-                    {
-                      "type": "runtime_flag",
-                      "name": "--experimental-wasm-threads"
-                    }
-                  ]
+                  "version_added": "16.6.0"
                 },
                 "oculus": "mirror",
                 "opera": "mirror",